How can I uninstall Ruby on ubuntu?

Question

How can I uninstall Ruby 1.9.2dev (2010-07-02) [i486-linux] on ubuntu? Need to reinstall - please help

Answer 1

On Lubuntu, I just tried apt-get purge ruby* and as well as removing ruby, it looks like this command tried to remove various things to do with GRUB, which is a bit worrying for next time I want to reboot my computer. I can't yet say if any damage has really been done.

Answer 2

Why you are removing old version of the ruby?

rvm install 2.4.2 // version of ruby u need to insatll rvm use 2.4.2 --default // set ruby version you want use by default

Using rvm you can install multiple ruby version in the system

Please follow below steps install ruby using rvm

sudo apt-get install libgdbm-dev libncurses5-dev automake libtool bison libffi-dev
gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 
curl -sSL https://get.rvm.io | bash -s stable 
source ~/.rvm/scripts/rvm
rvm install 2.4.2 
rvm use 2.4.2 --default 
ruby -v

The installation step will change for different Ubuntu version

For more info,

https://gorails.com/setup/ubuntu/14.04

Answer 3

Here is what sudo apt-get purge ruby* removed relating to GRUB for me:

grub-pc 
grub-gfxpayload-lists
grub2-common
grub-pc-bin 
grub-common 

Answer 4

At first find out where ruby is? then

rm -rf /usr/local/lib/ruby
rm -rf /usr/lib/ruby
rm -f /usr/local/bin/ruby
rm -f /usr/bin/ruby
rm -f /usr/local/bin/irb
rm -f /usr/bin/irb
rm -f /usr/local/bin/gem
rm -f /usr/bin/gem

Answer 5

This command should do the trick (provided that you installed it using a dpkg-based packet manager):

aptitude purge ruby

Answer 6

I have tried many include sudo apt-get purge ruby , sudo apt-get remove ruby and sudo aptitude purpe ruby, both with and without '*' at the end. But none of them worked, it's may be I've installed more than one version ruby.

Finally, when I triedsudo apt-get purge ruby1.9(with the version), then it works.